init.h.txt

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这个文件中主要包含的对于外界可用的函数就是下面的两个。
主要用于模块的初始化和清理。
/**
 * module_init() - driver initialization entry point
 * @x: function to be run at kernel boot time or module insertion
 *
 * module_init() will add the driver initialization routine in
 * the "__initcall.int" code segment if the driver is checked as
 * "y" or static, or else it will wrap the driver initialization
 * routine with init_module() which is used by insmod and
 * modprobe when the driver is used as a module.
 */
#define module_init(x)  __initcall(x);

/**
 * module_exit() - driver exit entry point
 * @x: function to be run when driver is removed
 *
 * module_exit() will wrap the driver clean-up code
 * with cleanup_module() when used with rmmod when
 * the driver is a module.  If the driver is statically
 * compiled into the kernel, module_exit() has no effect.
 */
#define module_exit(x)  __exitcall(x);